William J. JEFFERSON b. 1850?, Iowa to Montana

William J. JEFFERSON b. 1850?, Iowa to Montana

I am searching diligently for records of my ancestorWilliam J. JEFFERSON. What an enigma! The 1870census in Montana and his death certificate listhis birthplace as Iowa around 1850 but I still have no clue as to his parents' names or where specifically he was born. The names Ralph and William show up frequently in his descendants. He was in Marysville, Lewis Clark Co., Montana as a quartz miner by 1870. Further complicatingthings he died in Utah during a blizzard while passing through on his way to Ely, NV.